🐈 Cat Pregnancy Calculator
Plan for kitten arrival by estimating due dates from the breeding date and average feline gestation length.
Use the date when mating was observed or insemination occurred.
Gestation Snapshot
Typical cat pregnancies last 63–67 days. Average queens deliver around day 65.
How to Use This Calculator
Choose the breeding date
Select when mating or insemination likely occurred. If unsure, choose the midpoint of the suspected fertile window.
Run the estimation
Click “Estimate Due Date” to view the average due date, early/late window, and trimester milestones.
Plan veterinary care
Use the timeline to schedule prenatal checks, nutritional adjustments, and preparations for whelping.
Formula
Due Date = Breeding Date + Gestation Days
For cats, gestation typically lasts 63–67 days. This calculator uses an average of 65 days and provides early/late estimates to account for natural variation between queens and litters.
Full Description
Feline pregnancies are comparatively short, and most queens deliver kittens within nine weeks of conception. Tracking the likely breeding date allows cat guardians to anticipate key milestones, arrange veterinary support, and prepare a safe nesting environment.
Because cats can mate multiple times during a heat cycle, due dates can vary slightly even within the same litter. Environmental stress, nutrition, and litter size may also influence gestation length. Always confirm pregnancy and fetal health with a licensed veterinarian.
Frequently Asked Questions
How accurate is the estimated due date?
The calculation is based on average gestation lengths. Individual queens may deliver a few days earlier or later. Veterinary ultrasound or palpation can refine the estimate.
What if I do not know the exact breeding date?
Use the first observed mating or the midpoint of the suspected heat cycle. Monitoring behavioral signs (nesting, appetite changes) helps adjust expectations.
When should I schedule a vet check?
Veterinarians typically recommend a prenatal visit around day 21–28 for confirmation and again near the due window for whelping guidance.
Can stress affect gestation length?
Yes. Stress, illness, and nutrition can influence pregnancy duration and outcomes. Provide a calm environment and balanced diet throughout gestation.